#define _CRT_SECURE_NO_WARNINGS 1


#include <stdio.h>
int Fib(int n)
{
	if (n == 1)
		return 0;
	else if (n == 2)
		return 1;
	else
		return Fib(n - 1) + Fib(n - 2);
}
int main()
{
	int n = 0;
	scanf("%d", &n);
	int i = 1;
	for (i = 1;; i++)
	{
		if (n >= Fib(i) && n < Fib(i + 1))
			break;
	}
	int num = (n - Fib(i)) < (Fib(i + 1) - n) ? (n - Fib(i)) : (Fib(i + 1) - n);
	printf("%d\n", num);
	return 0;
}